What is CVE-2023-6803?

CVE-2023-6803 is a medium-severity vulnerability in Github Enterprise Server, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.8/10. Published 2023-12-21.

How severe is CVE-2023-6803?

Medium severity. CVSS v3 base score is 5.8 out of 10.

Vulnerability in Github Enterprise Server

CVE-2023-6803

A race condition in GitHub Enterprise Server allows an outside collaborator to be added while a repository is being transferred. This vulnerability affected all versions of GitHub Enterprise Server since 3.8 and was fixed in version 3.8.12, 3.9.7, 3.10.4, and 3.11.1.

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

EPSS: 0.002 (6.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L.

Affected products

Github Enterprise Server — versions 3.8, 3.9, 3.10
Github Enterprise_server — versions 3.11.0

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

product-cna@github.com (Release Notes)
product-cna@github.com (Release Notes)
product-cna@github.com (Release Notes)
product-cna@github.com (Release Notes)

Frequently asked questions

What is CVE-2023-6803?: CVE-2023-6803 is a medium-severity vulnerability in Github Enterprise Server, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.8/10. Published 2023-12-21.
How severe is CVE-2023-6803?: Medium severity. CVSS v3 base score is 5.8 out of 10.